DS1643/DS1643P
READ CYCLE, AC CHARACTERISTICS
(0°C to 70°C; VCC = 5.0V ±=10%)
70 ns access
100 ns access
PARAMETER
SYMBOL MIN MAX MIN MAX UNITS NOTES
Read Cycle Time
Address Access Time
tRC
tAA
tCEL
70
5
100
5
ns
ns
ns
4
4
4
70
100
CE and CE2 to DQ Low-Z
tCEA
70
100
ns
4
CE Access Time
CE2 Access Time
tCE2A
tCEZ
80
25
105
35
ns
ns
4
4
CE and CE2 Data Off Time
OE to DQ Low-Z
tOEL
tOEA
tOEZ
tOH
5
5
5
5
ns
ns
ns
ns
4
4
4
4
35
25
55
35
OE Access Time
OE Data Off Time
Output Hold from Address
READ CYCLE TIMING DIAGRAM
WRITE CYCLE, AC CHARACTERISTICS
(0°C to 70°C; VCC = 5.0V ±=10%)
70 ns access
100 ns access
PARAMETER
SYMBOL MIN MAX MIN MAX UNITS NOTES
Write Cycle Time
Address Setup Time
tWC
tAS
tWEW
70
0
50
100
0
70
ns
ns
ns
4
4
4
WE Pulse Width
tCEW
60
75
ns
4
CE Pulse Width
CE2 Pulse Width
Data Setup Time
Data Hold Time
Address Hold Time
tCE2W
tDS
tDH
tAH
tWEZ
65
30
0
85
40
0
ns
ns
ns
ns
ns
4
4
4
4
4
5
5
25
35
WE Data Off Time
Write Recovery Time
tWR
5
5
ns
4
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DALLAS [ DALLAS SEMICONDUCTOR ]
